the dependent variable

This generic question is posed:
You have timed the rate at which participants can solve puzzles under three conditions of noise: high, medium,low. In addition, the participants are under the influence of either marijuana, caffeine, or alcohol. What kind of design do you have?
a. A 2X3 between-subjects factorial design
b. A 3X3 between subjects factorial design
c. A 3x2 between-subjects factoral design
d. A 3x3 between-subjects one-way design.

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The dependent variable in this case is the rate at which participants can solve puzzles. The independent variables are ...